Structured Weyl Points in Spin-Orbit Coupled Fermionic Superfluids

Physical Review Letters
Yong XuChuanwei Zhang

Abstract

We demonstrate that a Weyl point, widely examined in 3D Weyl semimetals and superfluids, can develop a pair of nondegenerate gapless spheres. Such a bouquet of two spheres is characterized by three distinct topological invariants of manifolds with full energy gaps, i.e., the Chern number of a 0D point inside one developed sphere, the winding number of a 1D loop around the original Weyl point, and the Chern number of a 2D surface enclosing the whole bouquet. We show that such structured Weyl points can be realized in the superfluid quasiparticle spectrum of a 3D degenerate Fermi gas subject to spin-orbit couplings and Zeeman fields, which supports Fulde-Ferrell superfluids as the ground state.

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Citations

Oct 26, 2016·Nature Materials·Lunan HuangAdam Kaminski
Mar 16, 2017·Advanced Materials·Catherine R RajamathiC N R Rao
Jun 21, 2017·Science Advances·Su-Yang XuM Zahid Hasan
Jul 7, 2017·Nature Communications·Fernando de JuanJoel E Moore
Dec 9, 2017·Physical Review Letters·Guoqing ChangM Zahid Hasan
Dec 9, 2017·Physical Review Letters·Peizhe TangShou-Cheng Zhang
Jan 31, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Chun-Liang LinNoriaki Takagi
Nov 22, 2017·Nature Communications·Nitesh KumarChandra Shekhar
Jan 6, 2018·Physical Review Letters·A Alexandradinata, Leonid Glazman
Aug 16, 2016·Physical Review Letters·Meng XiaoShanhui Fan
Jan 16, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Beibing HuangNing Xu
Feb 19, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Chun-Liang LinNoriaki Takagi
Jul 9, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·M Maiti, J Smotlacha
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Aug 27, 2016·Physical Review Letters·Zhi-Ming YuShengyuan A Yang
Feb 16, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Chun-Liang LinNoriaki Takagi
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